IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0433116
(2012-03-28)
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등록번호 |
US-8337197
(2012-12-25)
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발명자
/ 주소 |
- Poe, Roger L.
- Wilkins, James
- Claxton, Michael G.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
60 |
초록
▼
A gas burner apparatus for discharging a mixture of fuel gas, air and flue gas into a furnace space of a furnace wherein the mixture is burned and flue gas having a low content of nitrous oxides and carbon monoxide is formed is provided. The burner tile includes at least one gas circulation port ext
A gas burner apparatus for discharging a mixture of fuel gas, air and flue gas into a furnace space of a furnace wherein the mixture is burned and flue gas having a low content of nitrous oxides and carbon monoxide is formed is provided. The burner tile includes at least one gas circulation port extending though the wall of the tile. The interior surface of the wall of the tile includes a Coanda surface. Fuel gas and/or flue gas conducted through the gas circulation port follows the path of the Coanda surface which allows more flue gas to be introduced into the stream. The exterior surface of the wall of the tile also includes a Coanda surface for facilitating the creation of a staged combustion zone. Also provided are improved burner tiles, improved gas tips and methods of burning a mixture of air, fuel gas and flue gas in a furnace space.
대표청구항
▼
1. A gas tip for use in association with a gas burner apparatus, comprising: a gas barrel for connection to a source of fuel gas;a gas deflector attached to said gas barrel; anda fuel gas outlet disposed between said gas barrel and said gas deflector, said gas deflector having an exterior surface th
1. A gas tip for use in association with a gas burner apparatus, comprising: a gas barrel for connection to a source of fuel gas;a gas deflector attached to said gas barrel; anda fuel gas outlet disposed between said gas barrel and said gas deflector, said gas deflector having an exterior surface that includes a Coanda surface positioned with respect to said fuel gas outlet such that fuel gas discharged from said fuel gas outlet follows the path of said Coanda surface;wherein said gas burner apparatus comprises: a plenum including a housing for attachment to said furnace, said housing including:an upper end attached to said furnace, said upper end having an air outlet disposed therein;a lower end opposing said upper end; anda sidewall connecting said upper end and said lower end together, wherein at least one of said sidewall and said lower end has an air inlet disposed therein;a burner tile having a central opening therein for receiving air from said air outlet of said housing, said tile including: a bottom end attached to said upper end of said housing over said air outlet;a top end opposing said bottom end, said top end including a discharge outlet; anda wall connecting said bottom end to said top end and surrounding said central opening, said wall extending into said furnace and having an interior surface and an exterior surface; andwherein said gas tip is connected to the source of fuel gas and operably associated with said burner tile such that a fuel gas and air mixture can be burned in the presence of a flue gas and produce a low content of nitrous oxide. 2. The gas tip of claim 1, wherein said exterior surface of said gas deflector includes an annular Coanda surface positioned with respect to said fuel gas outlet such that fuel gas discharged from said fuel gas outlet follows the path of said annular Coanda surface. 3. The gas tip of claim 1, wherein said gas tip has a tulip shape. 4. The gas tip of claim 1, wherein said gas tip is operably associated with said burner tile such that fuel gas is injected into said central opening of said burner tile. 5. The gas tip of claim 1, wherein said gas tip is operably associated with said burner apparatus such that fuel gas is injected from outside of said burner tile to a point adjacent to said discharge outlet of said burner tile. 6. The gas tip of claim 1, wherein: said gas tip has a tulip shape and the exterior surface of said gas deflector includes an annular Coanda surface positioned with respect to said fuel gas outlet such that fuel gas discharged from said fuel gas outlet follows the path of said annular Coanda surface;wherein said burner apparatus further comprises: primary fuel gas injection means connected to a source of fuel gas and operably associated with said burner apparatus for injecting primary fuel gas into said central opening of said burner tile; andsecondary fuel gas injection means connected to a source of fuel gas and operably associated with said burner apparatus for injecting secondary stage fuel gas from outside of said burner tile to a point adjacent to said discharge outlet of said burner tile, and wherein at least one of said primary fuel gas injection means and said secondary fuel gas injection means includes said gas tip as a discharge nozzle; andsaid wall of said burner tile includes at least one gas circulation port and includes a Coanda surface. 7. The gas tip of claim 1, wherein said wall of said burner tile includes a Coanda surface. 8. The gas tip of claim 7, wherein said Coanda surface is on said interior surface of said wall and said Coanda surface bulges into said central opening. 9. The gas tip of claim 7, wherein said Coanda surface is on said exterior surface of said wall and said Coanda surface bulges outwardly from said exterior surface. 10. The gas tip of claim 7, wherein said wall of said burner tile further includes at least one gas circulation port. 11. The gas tip of claim 7, wherein said burner apparatus further comprises: primary fuel gas injection means connected to a source of fuel gas and operably associated with said burner apparatus for injecting primary fuel gas into said central opening of said burner tile; andsecondary fuel gas injection means connected to a source of fuel gas and operably associated with said burner apparatus for injecting secondary stage fuel gas from outside of said burner tile to a point adjacent to said discharge outlet of said burner tile, andwherein at least one of said primary fuel gas injection means and said secondary fuel gas injection means includes said gas tip as a discharge nozzle. 12. A gas burner apparatus for discharging a mixture of fuel gas and air into a furnace wherein the mixture is burned in the presence of flue gas while producing a low content of nitrous oxides comprising: a plenum including a housing for attachment to said furnace, said housing including: an upper end attached to said furnace, said upper end having an air outlet disposed therein;a lower end opposing said upper end; anda sidewall connecting said upper end and said lower end together, wherein at least one of said sidewall and said lower end has an air inlet disposed therein;a burner tile having a central opening therein for receiving air from said air outlet of said housing, said tile including: a bottom end attached to said upper end of said housing over said air outlet;a top end opposing said bottom end, said top end including a discharge outlet; anda wall connecting said bottom end to said top end and surrounding said central opening, said wall extending into said furnace and having an interior surface and an exterior surface,primary fuel gas injection means connected to a source of fuel gas and operably associated with said burner apparatus for injecting primary fuel gas into said central opening of said burner tile; andsecondary fuel gas injection means connected to a source of fuel gas and operably associated with said burner apparatus for injecting secondary stage fuel gas from outside of said burner tile to a point adjacent to said discharge outlet of said burner tile,wherein at least one of said primary fuel gas injection means and said secondary fuel gas injection means includes a Coanda fuel gas discharge nozzle that includes: a gas barrel for connection to a source of fuel gas;a gas deflector attached to said gas barrel; anda fuel gas outlet disposed between said gas barrel and said gas deflector, said gas deflector having an exterior surface that includes a Coanda surface positioned with respect to said fuel gas outlet such that fuel gas discharged from said fuel gas outlet follows the path of said Coanda surface. 13. The gas burner apparatus of claim 12, wherein said primary fuel gas injection means includes said Coanda fuel gas discharge nozzle. 14. The gas burner apparatus of claim 12, wherein said secondary fuel gas injection means includes said Coanda fuel gas discharge nozzle. 15. The gas burner apparatus of claim 12, wherein said primary fuel gas injection means and said secondary fuel gas injection means each include said Coanda fuel gas discharge nozzle. 16. The gas burner apparatus of claim 12, wherein said exterior surface of said gas deflector of said Coanda fuel gas discharge nozzle includes an annular Coanda surface positioned with respect to said fuel gas outlet such that fuel gas discharged from said fuel gas outlet follows the path of said annular Coanda surface. 17. The gas burner apparatus of claim 12, wherein said Coanda fuel gas discharge nozzle has a tulip shape. 18. A gas burner apparatus for discharging a mixture of fuel gas and air into a furnace wherein the mixture is burned in the presence of flue gas while producing a low content of nitrous oxides comprising: a plenum including a housing for attachment to said furnace, said housing including: an upper end attached to said furnace, said upper end having an air outlet disposed therein;a lower end opposing said upper end; anda sidewall connecting said upper end and said lower end together, wherein at least one of said sidewall and said lower end has an air inlet disposed therein;a burner tile having a central opening therein for receiving air from said air outlet of said housing, said tile including: a bottom end attached to said upper end of said housing over said air outlet;a top end opposing said bottom end, said top end including a discharge outlet; anda wall connecting said bottom end to said top end and surrounding said central opening, said wall extending into said furnace and having an interior surface and an exterior surface,pilot means for igniting said burner attached to a source of fuel gas and extending into said central opening of said tile, wherein said pilot means includes a pilot gas tip, said pilot gas tip including: a gas barrel for connection to a source of fuel gas;a gas deflector attached to said gas barrel; anda fuel gas outlet disposed between said gas barrel and said gas deflector, said gas deflector having an exterior surface that includes a Coanda surface positioned with respect to said fuel gas outlet such that fuel gas discharged from said fuel gas outlet follows the path of said Coanda surface. 19. The gas burner apparatus of claim 18, wherein said exterior surface of said gas deflector includes an annular Coanda surface positioned with respect to said fuel gas outlet such that fuel gas discharged from said fuel gas outlet follows the path of said annular Coanda surface. 20. The gas burner apparatus of claim 18, wherein said pilot gas tip has a tulip shape.
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